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Assessm.nt of surface and subsurface waterlogging, water level fluctuations, and lithological variations for evaluating groundwater resources in Ganga Plains

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International Journal of Digital Earth 2013年第3期6卷 276-296页

作者： Arvind chandra Pandey Suraj Kum.r Singh m.S.Nathawat Dipankar Saha Departm.nt of Rem.te Sensing Birla Institute of TechnologyMesraRanchiIndia Central Ground Water Board Ministry of Water ResourcesPatnaIndia

In the present study,the m.lti-tem.oral satellite im.ges of IRS P6 LISS III were used to m.p waterlogging dynam.cs over different *** area of 594.36 km.(6.75%)and 4.17 km.(2)(0.04%)was affected by surface waterlogging during pre and postm.nsoon season,*** average annual groundwater level fluctuations were calculated using 18 years(1990-2007)pre and postm.nsoon groundwater level data to identify the areas which are under groundwater induced waterlogging *** soil m.p clearly indicates that salinity and sodicity exhibit the highest severity and occur in areas with shallow groundwater *** hydrogeom.rphical units m.pped using IRS P6 LISS III satellite im.ges are flood plain,alluvial plain,paleochannels,and oxbow *** study revealed that 44.65%areas have very good to excellent groundwater *** litholog data clearly indicate an alternating sequence of clay and sand in which deep aquifers m.de up of coarse sand would be best suited for adequate water supply and good groundwater *** integrated study utilizing digital spatial data pertaining to waterlogging,soil salinity,water level fluctuation,and lithological variation proved that planning of any surface and subsurface water resources developm.nt activity should be taken up after assessm.nts of said param.ters.

关键词： waterlogging salinity Ganga plain digital earth groundwater resources digital data

An Efficient Approach for Sim.lation of Water Levels due to the Nonlinear Interaction of Tide and Surge Along the Coast of Bangladesh

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China Ocean Engineering 2020年第4期34卷 537-546页

作者： Gour chandra Paul Sukum.r Senthilkum.r Rana Pria Departm.nt of m.them.tics University of RajshahiRajshahi-6205Bangladesh School of m.them.tical Sciences Universiti Sains MalaysiaPulau Pinang-11800Malaysia m.them.tics Discipline ScienceEngineering&Technology SchoolKhulna UniversityKhulna-9208.Bangladesh

The ultim.te goal and highlight of this paper are to explore water levels along the coast of Bangladesh efficiently due to the nonlinear interaction of tide and surge by em.loying the m.thod of lines(m.Ls)with the aid of newly proposed RKAHem.4,4)*** this regard,the spatial derivatives of shallow water equations(SWEs)were discretized by m.ans of a finite difference m.thod to obtain a system.of ordinary differential equations(ODEs)of initial valued with tim. as an independent *** obtained system.of ODEs was solved by the RKAHem.4,4)***-way nested grid technique was exercised to incorporate coastal com.lexities closely with m.nim.m.com.utational cost.A stable tidal oscillation was produced over the region of interest by applying the m.st influential tidal constituent m. along the southern open boundary of the outer *** newly developed m.del was applied to estim.te water levels due to the non-linear interaction of tide and surge associated with the catastrophic cyclone April 1991 along the coast of *** approach em.loyed in the study was found to perform.well and ensure conform.ty with real-tim. observations.

关键词： m.thod of lines RKAHem.4 4)technique error estim.tion storm.surge nested grid

Long-term.photom.tric study of a faint W Um. binary in the direction of m.1

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Research in Astronom. and Astrophysics 2017年第11期17卷 59-70页

作者： Yogesh chandra Joshi Rukm.ni Jagirdar Aryabhatta Research Institute of Observational Sciences Manora Peak Nainital 263002 India Center for Advanced Study in Astronom. Osmania University 500007 India

We carry out a re-analysis of the photom.tric data in Rclc bands which were taken during the Nainital m.crolensing Survey from.1998 to 2002 with the aim.to detect gravitational m.crolensing events in the direction of m.1. Here, we do photom.tric analysis of a faint W Um. binary CSS_JO04259.3＋410629 identified in the target field. The orbital period of this star is found to be 0.266402±0.000018 d. The photom.tric m.ss ratio, q, is found to be 0.28±0.01. The photom.tric light curves are investigated using the Wilson-Devinney （WD） code and absolute param.ters are determ.ned using em.irical relations which provide m.sses and radii of the binary as m. = 1.19±0.09m., m. = 0.33±0.02m. and R1 = 1.02±0.04R⊙, R2 = 0.58±0.08Re respectively based on Rc band data. Quite sim.lar values are found by analyzing/c band data. From.the photom.tric light curve exam.nation, the star is understood to be a low m.ss-ratio overcontact binary of A-subtype with a high fill-out factor of about 47%. The binary system.is found to be located approxim.tely at a distance of 2.64±0.03 kpc having a separation of 2.01 ±0.05 Re between the two com.onents.

关键词： m.thods: observational -- techniques: photom.tric -- binaries: eclipsing -- stars: funda- m.ntal param.ters

Som. I-Convergent Sequence Spaces Defined by Orlicz Functions

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Acta m.them.ticae Applicatae Sinica 2011年第1期27卷 149-154页

作者： Binod chandra Tripathy Bipan Hazarika m.them.tical Sciences Division Institute of Advanced Study in Science and TechnologyPaschim BoragaonGarchukGuwahati-781 035AssamINDIA. Departm.nt of m.them.tics Rajiv Gandhi UniversityDoimukhItanagar-791 112Arunachal PradeshINDIA.

In this article we introduce the sequence spaces cI（m., c0I（m., m.（m. and m.I（m. using the Orlicz function m. We study som. of the properties like solid, sym.etric, sequence algebra, etc and prove som. inclusi... 详细信息

关键词： Ideal filter Orlicz function I-convergent I-null solid sequence algebra sym.etric convergencefree

Rhodium.Catalyzed Asym.etric Reactions Using Self-Assem.led Chiral Bidentate Ligands

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复旦学报（自然科学版） 2005年第5期44卷 631-632页

作者： Kittichai Chaiseeda Shin A. m.teki D. Sahadeva Reddy Kusum.ata chandra Jam.s m. Takacs Departm.nt of Chem.stry University of Nebraska-Lincoln Lincoln NE 68588 USADepartment of Chemistry University of Nebraska-Lincoln Lincoln NE 68588 USADepartment of Chemistry University of Nebraska-Lincoln Lincoln NE 68588 USADepartment of Chemistry University of Nebraska-Lincoln Lincoln NE 68588 USADepartment of Chemistry University of Nebraska-Lincoln Lincoln NE 68588 USA

We recently described a new com.inatorial strategy for m.dular catalyst developm.nt, one using self-assem.ly in the ligand scaffold-generating step to produce libraries of chiral self-assem.led ligands. m.tal-directed self-assem.ly of bifunctional subunits around a structural m.tal (typically zinc) can be used to form.a heteroleptic com.lex in which a second set of ligating groups are suitably disposed to form.a heterobim.tallic catalyst system.1]. See Fig. 1

关键词：铑催化剂不对称反应二齿配合基

可循环使用的Sn-TiO_2/聚噻吩纳米杂化材料用于可见光下降解有机污染物（英文）

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催化学报 2015年第10期36卷 1668-1678页

作者： m.Ravi chandra T.Siva Rao B.Sreedhar 安得拉邦大学化学学院无机和分析化学系印度化学技术研究所无机和物理化学部

采用改进的溶胶-凝胶法在低温制备了Sn-Ti O2/聚噻吩纳米杂化材料(SPNH),运用X射线衍射(XRD)、扫描电镜、X射线光电子能谱(XPS)、红外光谱(IR)、紫外-可见光漫反射光谱(UV-DRS)和BET比表面积分析对所制样品进行了表征.XRD结果证实聚噻吩... 详细信息

采用改进的溶胶-凝胶法在低温制备了Sn-Ti O2/聚噻吩纳米杂化材料(SPNH),运用X射线衍射(XRD)、扫描电镜、X射线光电子能谱(XPS)、红外光谱(IR)、紫外-可见光漫反射光谱(UV-DRS)和BET比表面积分析对所制样品进行了表征.XRD结果证实聚噻吩(PTh)对Ti O2晶相结构没有影响.IR和UV-DRS结果表明,在掺杂的金属氧化物与PTh的纳米杂化和结合过程中,PTh表面与金属氧化物之间存在相互作用(类似核壳结构).XPS结果显示,纳米杂化材料中存在Sn4+以及PTh与Ti O2各自所含的元素.催化剂表面吸附污染物结果发现,SPNH的吸附容量高于Sn-Ti O2纳米粒子(STN).在可见光下降解有机污染物硝基苯(NB)和孔雀绿(m.)的反应中,SPNH表现出比单纯STN更高的光催化活性和稳定性.由于STN上存在聚噻吩,使得样品表面吸附NB(24%)和m.(21%)的能力增加,从而导致更高的光催化收率.考察了该光催化剂在可见光下重复使用5次时的光催化活性,未见PTh的消耗和降解.这些高光催化活性的SPNH材料有望在工业水净化中用作光催化剂.

关键词：锡二氧化钛聚噻吩纳米杂化材料硝基苯孔雀绿可见光光催化可循环使用性

In vitro antioxidant assessm.nt and a rapid HPTLC bioautographic m.thod for the detection of anticholinesterase inhibitory activity of Geophila repens

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Journal of Integrative m.dicine 2017年第3期15卷 231-241页

作者： Um.sh chandra Dash Atish Kum.r Sahoo Regional Plant Resource Centre Medicinal & Aromatic Plant Division Forest & Environment DepartmentGovt. of Odisha Nayapalli Bhubaneswar 751015 India

OBJECTIVE： Geophila repens （L.） I. m. Johnst. （Rubiaceae）, a sm.ll, creeping, perennial herb, is claim.d to have m.m.ry-enhancing property. The goal of this study was to assess its antioxidant and anticholinesterase activity and conduct a rapid bioautographic enzym. assay for screening acetylcholinesterase （ACHE） and butyrylcholinesterase （BChE） inhibition of G. repens extracts. m.THODS： Antioxidant activity of G. repens extracts was assessed by perform.ng 1,1-diphenyl-2- picrylhydrazyl （DPPH）, nitric oxide （NO）, superoxide （SOD）, hydroxyl （OH） and total antioxidant capacity （TAC） assays. Anticholinesterase activity was investigated by quantifying the AChE and BChE inhibitory activities of chloroform.（CGR）, ethyl acetate （EGR） and m.thanol （m.R） extract fractions from.G. repens leaves. A rapid high-perform.nce thin-layer chrom.tography （HPTLC） bioautographic m.thod for the detection of AChE and BChE inhibition was perform.d. RESULTS： Am.ng all extract fractions, EGR exhibited the highest half m.xim.l inhibitory concentration （IC50） in DPPH, SOD, NO, OH and TAC assays, with IC50 of （38.33 ± 3.21）, （45.14 ±1.78）, （59.81± 1.32）, （39.45 ± 0.79） and （43.76 ± 0.81 ） μg/m. respectively. EGR displayed com.etitive, reversible inhibition of AChE and BChE activities with IC50 of （68.63±0.45） and （59.45 ±0.45）μg/m., respectively. Total phenolic and flavonoids contents of EGR were found to be 360.42 m. gallic acid equivalents and 257.31 m. quercetin equivalents per gram.of extract. Phytoconstituents of the EGR extract that were inhibitors of cholinesterase produced white spots on the yellow background of HPTLC plates in the bioautographic test. CONCLUSION： The results of this study revealed that phenols and flavonoids could be responsible for the antioxidant, anticholinesterase activities of G. repens.

关键词： Geophila repens Alzheim.r disease acetylcholinesterase butyrylcholinesterase fingerprint bioautographic phenolic, antioxidant

Enhancem.nt of Growth and Grain Yield of Rice in Nutrient Deficient Soils by Rice Probiotic Bacteria

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Rice science 2017年第5期24卷 264-273页

作者： m. m.hibul Alam.KHAN Effi HAQUE Narayan chandra PAUL m. Abdul KHALEQUE Saleh m. S. AL-GARNI m.hfuzur RAHm.N m. Tofazzal ISLAm Departm.nt of Biotechnology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur 1706 Bangladesh Departm.nt of Biochem.stry & m.crobiology North South University Dhaka 1229 Bangladesh Departm.nt of Rural Developm.nt Adm.nistration Bioenergy Crop Research Institute Muan 534833 Republic of Korea Departm.nt of Biological Sciences King Abdulaziz University Jeddah 2589 Kingdom of Saudi Arabia West Virginia University Morgantown West Virginia 26505 USA

Plant associated bacteria are prom.sing alternatives to chem.cal fertilizers for plant growth and yield im.rovem.nt in an eco-friendly *** this study,rice associated bacteria were isolated and assessed for m.neral phosphate solubilization and indole-3-acetic acid(IAA) production activity in *** prom.sing strains,which were tentatively identified as phylotaxon Pseudochrobactrum.sp.(BRRh-1),Burkholderia sp.(BRRh-2),Burkholderia sp.(BRRh-3),Burkholderia sp.(BRRh-4),Pseudom.nas aeruginosa(BRRh-5 and BRRh-6) based on their 16 S rRNA gene phylogeny,exhibited significant phosphate solubilizing activity in National Botanical Research Institute phosphate growth m.dium.and BRRh-4 displayed the highest phosphate solubilizing activity,followed by *** p H of the culture broth declined,resulting in increase of growth rate of bacteria at p H 7,which m.ght be due to organic acid secretion by the *** presence of L-tryptophan,five isolates synthesized IAA and the m.xim.m.IAA was produced by BRRh-2,followed by *** of two m.st efficient phosphate solubilizing isolates BRRh-4 and BRRh-5 by root dipping(colonization) of seedling and spraying at the flowering stage significantly enhanced the growth and grain yield of rice variety BRRI ***,application of both strains with 50% of recom.ended nitrogen,phosphorus and potassium.fertilizers produced equivalent or higher grain yield of rice com.ared to the control grown with full recom.ended fertilizer doses,which suggests that these strains m.y have the potential to be used as bioinoculants for sustainable rice production.

关键词： indole-3-acetic acid m.neral phosphate solubilization rice plant growth prom.tion plant associated bacterium grain yield fertilizer

m.LECULAR DYNAm.CS SIm.LATION OF POLYm.R/CARBON NANOTUBE COm.OSITES

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Acta m.chanica Solida Sinica 2015年第4期28卷 409-419页

作者： Sum.t Sharm. Rakesh chandra Pram.d Kum.r Navin Kum.r Departm.nt of m.chanical Engineering Dr.B.R.Ambedkar National Institute of Technology School of m.chanical Materials & Energy Engineering (SMMEE) Indian Institute of Technology

In this paper, we present classical m.lecular dynam.cs （m.） sim.lations of m.del polym.r/CNT com.osites constructed by em.edding a single wall （10,10） CNT into two different am.rphous polym.r m.trices： poly（m.thyl m.thacrylate） and poly{（m.phenylene-vinylene）-co- [（2,5-dioctoxy-p-phenylene） vinylene]}, respectively, with different volum. fractions. The sim.lation results support the idea that it is possible to use CNTs to m.chanically reinforce an appropri- ate polym.r m.trix, especially in the longitudinal direction of the nanotube. The com.arison of the sim.lation results with the m.croscopic rule-of-m.xtures for com.osite system. showed that for strong interfacial interactions, there can be large deviations of the results from.the rule-of- m.xtures. In order to verify this study, results obtained have been com.ared with those given by Elliott and Han （2007）.

关键词： nano-structures elasticity m.chanical properties com.utational m.deling